We don’t prohibit public, passengers or press from photographing, videotaping, or filming at screening locations. You can take pictures at our checkpoints as long as you’re not interfering with the screening process or slowing things down. We also ask that you do not film or take pictures of our monitors.
I was videoing a checkpoint during a lock-down and was told by the port authority/airport police that I wasn't allowed to point my camera at the 'secured area.' This was at Newark just this last January (when they locked it down because someone ran through the 'secured area' exit).
Missing context:
However… while the TSA does not prohibit photographs at screening locations, local laws, state statutes, or local ordinances might. Your best bet is to call ahead and see what that specific airport’s policy is.
hmm... There were signs at JFK and also at SFO that prohibited cameras last time I traveled internationally (about a year ago). Where is this quote from?